The Single Table Dedupe module is the cornerstone of the DemandTools suite of tools.  Capable of detecting duplicates and merging both standard and custom Salesforce objects, this module is powerful and can help users achieve lower frequency of duplicates.  The Lead Conversion module allows mass converting of Leads with the ability to compare against the Contact and Account objects to eliminate duplicates being created through this process. The Deduplication Badge is awarded after successfully passing both the Single Table Dedupe and Lead Conversion tests.  This is a prerequisite for DemandTools Certification.